The application of a submerged lance injection technique to the direct smelting of a Missouri lead concentrate

Author

Rachid Ben Slimane

Abstract

"Slag-bullion equilibration tests were carried out to establish tie-lines between lead-rich and oxysulfate phases at several combinations of temperature and SO₂ partial pressure. The results obtained using sampling and quenching techniques were in good agreement and indicated the oxysulfate phase deviated very little from being a PbO-PbSO₄ melt. This deviation became more and more appreciable with increasing SO₂ pressure and/or temperature. However, it was less acute than previously determined.

An analytical solution was performed to establish equilibrium tie-lines between Pb-S and PbO-PbSO₄ melts. The solution relied on subregular solution models by Eric and Timucin for the Pb-S melt, and by Jacob and Toguri for the PbO-PbSO₄ melt. The results were used to derive an equation for the standard free energy of formation of PbSO₄(ℓ) in the temperature range of 1200 to 1450 K.

The UMR version of SOLGASMIX, STEPSOL, was used in conjunction with the above metal and slag activity models to establish the tie-lines and to extend the results to regions not tested experimentally. The results allowed consideration of possible direct smelting processes for clean lead concentrates, such as a typical Missouri concentrate.

Excellent agreement between model predictions and analytical solution was obtained, suggesting confidence in the usefulness of the model. There is, however, a lack of agreement between the experimental data and the model predictions. The sources of this disappointing problem are not fully understood at this point"--Abstract, page ii.

Advisor(s)

Robertson, D. G. C.

Committee Member(s)

Schlesinger, Mark E.
Moore, Robert E., 1930-2003

Department(s)

Materials Science and Engineering

Degree Name

M.S. in Metallurgical Engineering

Publisher

University of Missouri--Rolla

Publication Date

Fall 1990

Pagination

xii, 122 pages

Note about bibliography

Includes bibliographical references (pages 118-121).

Rights

© 1990 Rachid Ben Slimane, All rights reserved.

Document Type

Thesis - Restricted Access

File Type

text

Language

English

Thesis Number

T 6165

Print OCLC #

23349510

Electronic OCLC #

1090541650

Link to Catalog Record

Electronic access to the full-text of this document is restricted to Missouri S&T users. Otherwise, request this publication directly from Missouri S&T Library or contact your local library.

Recommended Citation

Slimane, Rachid Ben, "The application of a submerged lance injection technique to the direct smelting of a Missouri lead concentrate" (1990). Masters Theses. 934.
https://scholarsmine.mst.edu/masters_theses/934